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Merge pull request #263 from adrianludwin/docs
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Update docs for v1.1
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k8s-ci-robot authored Feb 24, 2023
2 parents ff955f9 + e59fa8c commit 3414be0
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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -44,7 +44,7 @@ All HNC issues are assigned to an HNC milestone. So far, the following
milestones are defined or planned:

* [v1.1](https://github.com/kubernetes-sigs/hierarchical-namespaces/milestone/3):
Improved UX for managed labels; performance improvements.
Hierarchical quotas; inclusive propagation.
* [v1.0](https://github.com/kubernetes-sigs/hierarchical-namespaces/milestone/2):
HNC recommended for production use (released March 31 2022)
* [v0.9](https://github.com/kubernetes-sigs/hierarchical-namespaces/milestone/1):
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10 changes: 2 additions & 8 deletions docs/releasing.md
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Expand Up @@ -36,14 +36,8 @@ that anyone can use, but without leaking personal access tokens._

Ensure that the [user guide](user-guide/) is up-to-date with all the latest or
changed features. _This must be done on the master branch **before** creating
the release branch._ The user guide should usually contain instructions for at
least the last two minor releases of HNC - e.g., if the current version is v0.5,
it should contain instructions for both v0.4 and v0.5. But if you're _about_ to
release v0.6, then you should:

* In the master docs README, add a link to the v0.4 version of the user guide.
* Delete everything about v0.4
* Add all new information for v0.6.
the release branch._ We used to remove instructions for old versions of HNC, but
since v1.0 this should no longer be necessary as it's not changing as quickly.

## Create a release branch

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5 changes: 3 additions & 2 deletions docs/user-guide/README.md
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@@ -1,4 +1,4 @@
# HNC User Guide v1.0 (and v0.9)
# HNC User Guide v1.1

Authors: [email protected] and other contributors from wg-multitenancy

Expand All @@ -12,7 +12,7 @@ This guide explains how to use hierarchical namespaces, explains some of the
concepts behind them for a more in-depth understanding, and covers some best
practices.

**Note: this doc covers HNC v1.0.x and v0.9.x.** For older versions of HNC, see
**Note: this doc covers HNC v1.0 and later.** For older versions of HNC, see
below.

## Table of contents
Expand All @@ -25,6 +25,7 @@ below.

## Older user guides

* [HNC v0.9](https://github.com/kubernetes-sigs/hierarchical-namespaces/tree/hnc-v0.9/docs/user-guide)
* [HNC v0.8](https://github.com/kubernetes-sigs/multi-tenancy/tree/hnc-v0.8/incubator/hnc/docs/user-guide)
* [HNC v0.7](https://github.com/kubernetes-sigs/multi-tenancy/tree/hnc-v0.7/incubator/hnc/docs/user-guide)
* [HNC v0.6](https://github.com/kubernetes-sigs/multi-tenancy/tree/hnc-v0.6/incubator/hnc/docs/user-guide)
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49 changes: 26 additions & 23 deletions docs/user-guide/concepts.md
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Expand Up @@ -315,27 +315,28 @@ whichever labels they like. However, HNC will overwrite any changes made to
these labels, so other applications can trust these labels for policy
application.

*Note: in HNC v1.0, [managed labels](#admin-managed-labels) may also be trusted
for policy purposes.*
If tree labels are too restrictive for your purposes, you can also use [managed
labels](#admin-managed-labels), which require more work to set up but are also
managed by HNC and are therefore suitable for policy use.

<a name="basic-exceptions"/>

### Exceptions and propagation control

HNC typically propagates _all_ objects of a [specified type](how-to.md#admin-resources)
from ancestor namespaces to descendant namespaces. However, sometimes this is
too restrictive, and you need to create ***exceptions*** to certain policies. For example:

* A ResourceQuota was propagated to many children, but one child namespace now
has higher requirements than the rest. Rather than getting rid of the quota in
the parent namespace, or raising the limit for everyone, you can stop the
quota in the parent from being propagated to that _one_ child namespace,
allowing you to replace it with another, more suitable quota.
has higher requirements than the rest. Rather than getting rid of the quota in
the parent namespace, or raising the limit for everyone, you can stop the
quota in the parent from being propagated to that _one_ child namespace,
allowing you to replace it with another, more suitable quota.

* A RoleBinding allows any user to create subnamespaces under one namespace, but
we don’t want to allow those users to create additional levels of hierarchy
underneath those subnamespaces. So you can stop the role binding from being
propagated to _any_ child namespace.
we don’t want to allow those users to create additional levels of hierarchy
underneath those subnamespaces. So you can stop the role binding from being
propagated to _any_ child namespace.

Exceptions are defined using [annotations on the objects
themselves](how-to.md#use-limit-propagation). As a result, anyone who can edit
Expand All @@ -353,18 +354,19 @@ exclude those objects, or else delete the conflicting objects to allow them to
be replaced.

#### (Beta in v1.1) Opt-in propagation
The `Propagate` mode propagates all objects unless directed to otherwise via a selector,
using exceptions. By contrast, opt-in propagation, as set by the `AllowPropagate`
mode, doesn't propagate objects unless directed to by a selector. That is, for an object
with a selector, its behaviour will be identical in both the `Propagate` and `AllowPropagate` modes;
the only difference in behaviours is for objects without a selector.
The `Propagate` mode propagates all objects unless directed to otherwise via a
selector, using exceptions. By contrast, opt-in propagation, as set by the
`AllowPropagate` mode, doesn't propagate objects unless directed to by a
selector. That is, for an object with a selector, its behaviour will be
identical in both the `Propagate` and `AllowPropagate` modes; the only
difference in behaviours is for objects without a selector.

For example:

* A Secret exists on a namespace but we don't want this secret to be propagated
to all subnamespaces by default but instead only to one namespace of our choosing.
So you can choose to propagate to that _one_ child namespace using `AllowPropagate`
and exceptions.
to all subnamespaces by default but instead only to one namespace of our
choosing. So you can choose to propagate to that _one_ child namespace using
`AllowPropagate` and exceptions.

#### Built-in exceptions

Expand All @@ -374,10 +376,11 @@ objects from being propagated by HNC.
* Kubernetes Service Account Secrets
* ConfigMaps named `istio-ca-root-cert` or `kube-root-ca.crt`, which are
auto-created in new namespaces by Istio and Kubernetes respectively
* *Planned for HNC v1.0+:* Any objects with the label
* Any objects with the label
`cattle.io/creator:norman`, which are [inserted by Rancher to support
Projects](https://rancher.com/docs/rancher/v2.6/en/system-tools/#remove))
* *Planned for future version:* Secrets with type `helm.sh/release.v1`, which is auto-created in the namespaces where their respective Helm releases are deployed to.
* *HNC v1.1+:* Secrets with type `helm.sh/release.v1`, which is auto-created in
the namespaces where their respective Helm releases are deployed to.

<a name="admin"/>

Expand Down Expand Up @@ -517,9 +520,9 @@ problem, and will generally require human intervention to resolve.

<a name="admin-managed-labels"/>

### (Beta) Managed labels and annotations
### Managed labels and annotations

***Managed labels and annotations are new in HNC v1.0; please use with caution.***
***Managed labels and annotations are beta in HNC v1.0 and GA in HNC v1.1+.***

Just as certain objects can be propagated from parent namespaces to their
descendants, so can certain labels and annotations on namespaces. For example,
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18 changes: 9 additions & 9 deletions docs/user-guide/how-to.md
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Expand Up @@ -421,9 +421,9 @@ EOF

<a name="use-managed-labels"/>

### (Beta) Add a label or annotation to all namespaces in a subtree
### Add a label or annotation to all namespaces in a subtree

***Managed labels and annotations are new in HNC v1.0; please use with caution.***
***Managed labels and annotations are beta in HNC v1.0 and GA in HNC v1.1+.***

If your administrator has [created managed labels or
annotations](#admin-managed-labels), you may set them on any _full_ namespace
Expand Down Expand Up @@ -482,7 +482,7 @@ and webhooks) that were only introduced in v1.16.
There is no need to uninstall HNC before upgrading it unless specified in the
release notes for that version.

_Note: HNC has **experimental** support for HA deployments in v1.0. Please
_Note: HNC has **experimental** support for HA deployments in v1.0+. Please
contact us on Slack to discuss if you want to try it out._

#### Prerequisites
Expand Down Expand Up @@ -768,9 +768,10 @@ in the `Propagate` mode or `AllowPropagate`. Instead, to do so safely:
synchronizing all known source objects.
* Wait until `kubectl hns config describe` looks like it's identified the
correct number of objects of the newly added resource in its status.
* Change the propagation mode from `Remove` to `Propagate` or `AllowPropagate`.
HNC will then check to see if any objects will be overwritten, and will not
allow you to change the propagation mode until all such conflicts are resolved.
* Change the propagation mode from `Remove` to `Propagate` or `AllowPropagate`.
HNC will then check to see if any objects will be overwritten, and will not
allow you to change the propagation mode until all such conflicts are
resolved.

Alternatively, if you're certain you want to start propagating objects
immediately, you can use the `--force` flag with `kubectl hns config
Expand All @@ -779,10 +780,9 @@ edit the `config` object directly, which will bypass this protection.

<a name="admin-managed-labels"/>

### (Beta) Ask HNC to manage certain labels and annotations
### Ask HNC to manage certain labels and annotations

***Managed labels and annotations are new in HNC v1.0; please use with
caution.***
***Managed labels and annotations are beta in HNC v1.0 and GA in HNC v1.1+.***

See [here](concepts.md#admin-managed-labels) for the background on managed
labels and annotations. In order to get HNC to manage a label or annotation, use
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6 changes: 3 additions & 3 deletions docs/user-guide/quickstart.md
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Expand Up @@ -209,9 +209,9 @@ simply use the config subcommand:
kubectl hns config set-resource secrets --mode Propagate
```

Note: As of HNC v1.0+, the supported modes are `Propagate`, `Remove`,
`Ignore` and `AllowPropagate`. More may be added in the future; you can run `kubectl hns config
set-resource` for the latest documentation.
Note: The supported modes are `Propagate`, `Remove`, `Ignore` and (in HNC
v1.1+ only) `AllowPropagate`. More may be added in the future; you can run
`kubectl hns config set-resource` for the latest documentation.

Now, we should be able to verify that `my-creds` was propagated to `service-1`:

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